PwmDriver

PWM user driver.
A PwmDriver must implement all Pwm functions, but additionally this class provides an open()
function that will be called whenever a process obtains ownership of the PWM, to match the
existing close() function.

Public methods

close

void close ()

Closes the PWM.
This will be called when the PWM is closed by its owner. Any resources that need to
be cleaned up should be done so here.
This method may throw IOException to indicate I/O failure, but will still be considered
closed and may attempt to be re-opened in the future.